The Vadstena info comes from a book "Historien om Dansby. DANSBY GÅRD Ägare av gården från 1600-talet till 1999", by Katharina Anronsson at http://dansby.net/history/http://dansby.net/history/. It lists the torp or cottage (Carlslund), the year they lived there (1837), their names and birth years (Karl Jacob Täpp1816, Maja Stina Svensdotter1802) and the number of children living with them (3).
The names and birth years could be a coincidence, but it sounds like them. Maja Stina was old enough to have been married before and children from that marriage.